Over the main entrance is a vaulted dome, with a neat piece of groining in granite, also made by the convicts.
The bosses in the groining are yellow and green, as in the capitals.
The groining of its roof is the only one of the sort I have seen, it is composed of parallel ribs which cross one another.
The mouldings of the groining are extremely bold and simple.
The groining is now destroyed, and behind it are seen the corbels in the cross wall marking the rake of the first roof.
Its vaulting was pointed, with groining resting on columns, whose capitals were either Romanesque or Gothic.
The roof is of iron, the panels within the groining being overlaid with plaster.
She saw it all at a glance—the lights, the black shadows, the sudden glow of a match on the groining of the arch above.
The groining ribs of this porch are very richly decorated with sculpture of foliage in their mouldings.
The whole of the nave south wall remains, showing a row of windows and indications of the groining of the aisle.
1590s, earlier grine (1530s), from Middle English grynde "groin" (c.1400), originally "depression in the ground," from Old English grynde "abyss," perhaps also "depression, hollow," from Proto-Germanic *grundus (see ground). Altered 16c. by influence of loin or obsolete groin "snout." The architectural groin "edge formed by the intersection of two vaults" is from 1725.
The crease or hollow at the junction of the inner part of each thigh with the trunk, together with the adjacent region and often including the external genitals.